"GelSeal and the equivalent su
"GelSeal and the equivalent substance LocTite 518 creates a sealing condition due to the absence of air. What remains of the substance after torquing the retaining bolts, as you may have noticed during disasembly, is a very thin almost clear sheet of sealant.
There is a removing substance to remove that old sheet but I have found that it can also be removed by carefully using a sharp putty knife like tool. Just be carefull not to actually scrape into the aluminum surface.
There are various methods to applying this sealer. My method is to apply a thin bead of the sealant from one end of the crankcase to the other, then spreading it around with ones finger so that it encompasses all of the bolt holes.
Make sure that you do not apply the substance any closer than 1/4" to the Main Bearing areas or to the Taper Pin holes.
As mentioned above, the substance seals with the absence of air, meaning that as soon as you set the other half of the crancase in place, the substance starts to slowly take effect. So plan your job so that once you start this portion of the rebuild, you follow straight thru to the finish (all bolts tight and torqued).
The sealer substance that squeezes out internally will not harden as it will still be exposed to air. This will simply blow out the exhaust as the engine runs. The excess that squeezes out externally.... simply scrape/wipe it off to eliminate the gooey appearance.
The silicone route..... as London states, a waste of time and a substance to avoid.
When time permits, visit my store at:
http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store"